If
an aerial is in close proximity to other objects it cannot work
properly. This applies especially to large multi-element arrays.
The person who fixed this Antiference XG14B (that’s the big
aerial) shown here either didn’t know this, or he didn’t
care. With other aerials just above, the stack just below, the cowl
just to one side, and the mast between the elements, this expensive
product might as well be the cheapest of ten-element arrays. Note
also the loose cables and the re-use of an old chimney fixing.

The black object (arrowed) is the cap from the junction box, hanging
on its plastic strap. The fact that it isn’t actually on the
junction box means that the box and the cable will both fill with
water each time it rains.